MediaWiki is wiki software, released under the GPL, that is used by Wikimedia projects and others. It is an implementation of a wiki, a content pool that anyone can freely edit. It is developed using Phabricator, our instance of Phacility's Phabricator.

MediaWiki 1.31.1 is the latest stable version, and is recommended for third-party users.
Those running their own servers should upgrade for security reasons. Special:Version shows what version a site is running. You can play around in the local Sandbox to see this version in action.

MediaWiki 1.31.1 is available for download from MediaWiki.org, a site that is also responsible for the documentation of the software. MediaWiki 1.34.0-wmf.6 (644da90) is currently running on all Wikimedia sites. Third-party users should probably not run the alpha/beta versions of MediaWiki on publicly accessible servers at this time.

Technical

Versions

At the moment there is a stable version maintained for at least one year after its release date, and the last legacy versions still getting security fixes. Older versions are considered as insecure. As of March 2018 there are three supported versions: